Machine-belting



(N0 Model.) 4 4 Sheets-Sheet l. J.REESE.

MACHINE BELTING.

Patented Dec. 27,1881.

(No Model.) 4 Sheets-Sheet 2.

J. REESE.

MACHINE BELTING. I No. 251,377. Patented Dec. 27,1881.

EUEHEE (No Model.) 4 Sheets-SheetS. J. REESE.

MACHINE BELTING.

No. 251,377. Patented Dec. 27,1881.

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IE1; M, I u 52,14 d m/ J6 (No Model.) 4 Sheets-Sheet 4' J. REESE.MACHINE BELTING;

No. 251,377. Patented Dec. 27,1881.

FHHHZ I LI'EHEQBEE.

' UNITED STATES PATENT OFFICE.

JACOB REESE, OF PITTSBURG, PENNSYLVANIA.

MACHINE- BELTING.

SPECIFICATION forming part of Letters Patent No. 251,377, dated December27, 1881.

Application filed July 25, 1881.

To all whom it may concern:

Be it known that I, JACOB REESE, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Mechanism for the Transmission of Motion byMetallic Belting; and I do hereby declare the following to be a full,clear, and exact description thereof, reference beinghad to theaccompanyingdrawings, in which- Figure 1 on Sheet 1 indicates a planview of a steel hoop having a thickened or ribbed cen ter from which oneform of my improved belt is manufactured. Fig. 2 on Sheet 1 indicates anend view of the same. Fig. 3 on Sheet 1 is a plan view of a section ofbelting produced by forming a series of slots at proper intervals fromeach other in the hoop shown in Figs. 1 and 2. Fig. 4on Sheet 1indicates an endview of the same. Fig. 5 on Sheet 1 indicates a sideview of the belting mounted on pulleys provided with a series ofprojections at proper intervals upon its periphery to engage in theperforations of the metallic belt. Figs. 6 and 7 on Sheet 1 indicatecross-sections of the pulleys shown in Fig. 5. Fig.8 on Sheet 1 is aplan view of another form of belting produced by forming a series ofslots in a hoop having a transverse series of ribs rolled across itssurface. Fig. 9 on Sheet 1 indicates an edge view of the same. Fig.1onPlate2 indicates a third form of steel belting adapted to the use ofmy improvement, and is formed from a light flexible hoop of uniformthickness by punching a series of slots at proper intervals from eachother in the center of the hoop, and then bending the metal from theperforations tightly down against-the body of the hoop at the unpunchedend of the slots, thus forminga double thickness at'the wearing-points.Fig.2 indicates a side view of this form of belt mounted on suitablepulleys. Fig. 3 on Plate 2 indicates a plan view of a modified form ofthe belting shownin Fig. 1, andis formed by punching the metal entirelyaway at the perforations and slipping and stamping onto the unpunchedportions the clips shown in Figs. 4 and 5. Fig. 4 indicates a plan viewof one of the clips. Fig. 5 indicates an edge view of the same. Fig. 6onPlate 2 is a sideview of this class ofbelt-ing mounted on suitablepulleys. Fig. 1 on Plate (No model.)

3 indicates a fourth form of belting adapted for heavy work. Fig. 2indicates an end view of one of the cross-ribs of the same. Fig. 3indicates this form of belting mounted on suitable pulleys. Figs. 4 and5 indicate cross-sections of the pulleys. Fig. 1 on Plate 4 indicates afifth form of steel belting mounted on suitable pulleys and in positionfor elevating sawdust or other material. Fig. 2 indicates a plan view ofa section of the belt shown in Fig. 1. Fig. 3 indicates a side view ofone of the cross-ribs of the same. Fig. 4 indicates an end view of oneof the cross-ribs. Fig. 5 indicates a modified form of the belt shown inFigs. 1 and 2, mounted on suitable pulleys and adapted for elevatingsawdust and similar material. Fig. 6 indicates a plan view of a sectionof the belting shown in Fig. 5.

Like letters of reference indicate like parts wherever they occur.

The object of my invention is to provide a cheap, durable, and efficientmeans for the transmission of a positive motion from one shaft toanother by means of flexible metallic belting, either at a high or a lowvelocity. This object I have fully attained by means of the improvedform of flexible metallic belts and the pulleys which I shallhereinafter more fully describe.

-It has long been recognized as a desirable object to transmit power andto impart a positive motion from one shaft to another by means ofmetallic belting; but heretofore the forms of belting used were not welladapted to resist the shocks, jars, and strains to which they weresubjected in overcoming the inertia of the machinery, &c. In all cases,so far as I am aware,

the wearing portions of the belt have been so thin and possessed sosmall a power of resistance that rupture soon took place at such points.The remedy for this evil apparently may seem simple; but if the belt ismade of sufficient thickness to enable the wearing-points to stand, thebelt loses its elasticity, takes a permanent set in passing each pulley,causes a great loss of power, and becomes highly crystallized, andfracture soon takes place. Consequently no simple combinations of a beltand pulleys have been adapted for thetrausmission of power and positivemotion at high and at low rates of velocity, and the use of metallicbelts has been Ice almost exclusively limited to the employment ofchains and of wire ropes or cables. The use of the wire involves greatfirst cost, and considerable loss of power takes place, owing to thefact that the rope must be kept tight to prevent it from slipping on thepulleys, and the use of the chain is objectionable on account of beingnoisy, troublesome, and adapted only for the transmission ofmotion atalow velocity. In the use of my invention, therefore, I propose toobviate the preceding difficulties by producing a belt having a lightelastic body and heavy, rigid,and durable wearing-surfaces, which shalleither be rolled upon the hoop from which the belt is produced, or whichmay be formed separately, and then be attached at proper intervals tothe light elastic body, thus securing thickness, strength, anddurability at the points where those qualities are most desired, andstill maintaining the elastic nature of the body of the belt, so thatwhen mounted upon the proper form of pulleys I secure a simplecombination which insures a cheap, durable means oftransmitting powerand a positive motion either at a high or a low rate ofvelocity.

In the production ot'the form of belting shown in Figs. 3 and 4 on Plate1, I roll a steel hoop of the same width as is required for the finishedbelt, with a central longitudinal rib or thickened portion, as is shownin Figs. 1 and 2. The body of this hoop may be madewery thin, light, andflexible, but the central longitudinal rib should be of at least twicethe thickness of the body of the hoop. After the hoop has been rolled tothe form described, a series of perforations, at proper intervals fromeach other, are formed through the central rib or thickened portion ofthe hoop, which is then riveted at the ends, and the belt is then in afinished condition and capable of use.

In forming the pulleys I cast them with a face slightly wider than thewidth of the belt and with a central rib running around the center ofthe periphery. The pulley is then bored and its face and central ribturned true, after which it is mounted on a gear-cutting machine and aseries of transverse slots are cut through the central rib, so as toleave a series of projections, at proper intervals from each other, uponthe face of the pulley.

In forming the pulleys and-belting it will be readily understood that in.all instances the distance at which the slots are apart from each otherin the beltwill depend upon the distance at which the projections areapart from each other upon the center of the periphery of the pulleys,and that the projections must be exactly the same distance apart fromeach other upon each of the pulleys upon which the belt is to run.

Figs. 8 and 9 indicate another form, or more properly a modification ofthe form, of belting shown in Figs.3 and 4. In this case the hoop I isrolled of a uniform thickness in cross-section, but with a series oftransverse ribs at regular intervals upon its upper surface; and informing the belt the hoop is perforated in such a manner as to leave theribs or the increased thickness of the metal to act as a wearing-surfaceimmediately at the end of the perforations.

Fig. l on Plate 2 indicates another m'odification of the form ofbelting. In this case the hoop is rolled of equal or uniform thicknessat all parts of the metal, and the slots are formed by only punching themetal partially away at the perforations, the clips remaining attachedat one end of the slots which are formed; or, in other words, in formingthe perforations the pieces of metal are only cut or punched away atboth sides and one end of the slots, and remain attached to the hoop atthe other end of the slots. After the hoop has been punched in themanner described the clips are turned sharply over the metal at the endof the slots and are tightened down under a drop-press; or they may beriveted down to the body of the hoop, if desired. The belt is thenriveted at the end, so as to form a continuous perforated band of thelength desired.

Fig. 3 indicates another modification of the belting, which is formedfrom a hoop of the required form and gage by punching a series ofperforations at proper intervals from each other, the metal beingpunched entirely away at the perforations, and the clips shown in Figs.4 and 5 are then slipped over the metal at the end of eachperforation,.thus forming a triple thickness to withstand the wear atthose points. The hoop is then conveyed to a drop-press and the clipsare stamped down on it.

Fig. 2 shows both of the preceding modified forms of the elastic steelbelting mounted on pulleys.

Fig. 1 on Plate 3 indicates another modification of the form of thebelting, which is formed by two strips of flexible metal joined togetherat proper intervals by heavy, strong, and rigid cross-bars ofchannel-iron of the form indicated by Fig. 2. This form of belting isdesigned for heavy work where wide belts are required and where it is anobject to save material by its adoption. Fig. 3 shows the belt inposition, and Figs. 4 and 5 show cross-sections of the pulleys on whichit is mounted.

Fig. l on Plate 4 indicates another form of belting mounted on suitablepulleys and in po-' sition for elevating sawdust and other similarmaterial. Fig. 2 indicates a plan view of a section of the belt, whichis formed of two light elastic steel hoops or bands, which are joinedtogether at proper intervals by strong and heavy cross-sections composedof hard wood, each of the sections being grooved at the ends, as shownin Fig. 3, and in forming the belt the hoops are inserted within thegrooved ends of the cross-sections and fastened securely by a rivetpassing down through the end of the cross-section.

Fig. 5 indicates another form of belting for elevating purposes. Thisform is made of two light flexible bands of metal joined together at IIOangle-iron. These cross-sections are made of sufficient thickness towithstand the wear, and of such height as may be required to carry thematerial to be elevated.

I am aware that metallic belts having slotted openings have heretoforebeen in use; but I am not aware that metallic belts have heretofore beenknown or used having longitudinal or transverse strengtheningribsbetween such slots or openings.

I do not in this case claim the peculiar meth- 0d of construction andform of pulleys described in the specification and shown in thedrawings; but I reserve the right to do so in a future application.

Having described my invention, what I claim, and desire to secure byLetters Patent, is-

1. A belt composed of a metallic band or bands provided with slots oropenings at intervals, adapted to receive peripheral projections fromsuitable pulleys, and having longitudinal or transversestrengthening-ribs between such slots or openings, substantially as andfor the purpose herein described.

2. The combination of a metallic belt having slots or openings atintervals, .and having strengthening-ribs between the openings, and apulley having peripheral projections, so as to engage in said openings,substantially as and for the purpose set forth.

3. As an improved article of manufacture, a belt composed of a metallicband or hands provided with slots or openings, and having the intervalsbetween the openings men forced by strengthening-ribs, substantially asherein 3 5 described.

J AOOB REESE. Vitnesses FRANK M. REESE, JOHN M. BOURKE.

